Baker&#39;s furnace.



E. NELSON. BAKER'S FURNACE.

APPLICATION FILED SEPT-22, I9]?- Patented July 2, 1918.

E LOF NELSON bruins an,

JELOIF NELSON, 0F OAK CREEK, COLORADO.

BAKERS JEURNACE.

Specification of Letters Patent.

Patented July 2, lfl l.

Application filed September 22, 1917. Serial No. 192,750.

To all whom it may concern."

Be it known that l, ELor NnLsoN, a citizen of the United States, residing at Oak Creek, in the county of Routt and State of Colorado, have invented certain new and useful Improvements in Bakers Furnaces, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to bakers furnaces, and has for its primary object to provide an oven which is constructed to supply hot air without smoke and gases to the interior of the oven.

It is another and more particular object of the invention to provide an oven furnace having a hot air chamber at the top of the firebox and a smoke flue extending between said chamber and the bottom wall of the oven, said hot air chamber also extending around the sides of the oven which are provided with openings for the admission of the heated air to the oven.

It is another object of the invention to provide a furnace for bakers ovens wherein the smoke and gases are caused to traverse the bottom wall of the oven throughout the entire length thereof and are divided at the rear end of the oven and distributed over the rear oven wall, said furnace also having a longitudinal flue conducting the gases from the top wall .of the oven and spaced openings leading from said fiue to the stack a or conduit at the front end of the oven.

It is also a further general object of my invention to improve and simplify the construction of furnaces of the above type and provide means whereby the heating of the interior of the oven can be properly regulated as desired, so that much better results will be obtained in the baking of bread than is possible in the ordinary construction of bakers furnaces.

With the above and other objects in view, my invention consists in the construction, combination, and arrangement of parts to be hereinafter more fully described, claimed, and illustrated in the accompanying drawing, in which,

Figure 1 is a vertical longitudinal section through an oven furnace ml l' l ll ill 1w cordance with the preferred embodiment of the invention;

Fig. 2 is a transverse section taken on the line 22 of Fig. 1; and

Fig. 3 is a similar section taken on the line 3-3 of Fig. 1.

Referring in detail to the drawing, 5 designates the front wall of the oven, 6 the rear wall thereof, 7 the top wall and 8 the base wall. These oven walls may be of any desired construction and suitably reinforced if preferred, and also insulated in any approved manner.

The firebox 9 is centrally disposed between the side walls of the furnace structure and a hot air chamber 10 extends across the furnace above this firebox, said chamber having vertical legs 11 extending longitudinally along the opposite side walls of the firebox and the opposite ends of the hot air chamber terminating in spaced relation to the front and rear walls of the furnace.

The inner faces of the side walls of the furnace are recessed, as shown at 12, to receive the vertical side portions 13 of the hot air chamber 10 which extend upwardly to a point substantially centrally of the side walls of the oven proper which is indicated at 14. The side walls of the oven constitute the inner sides of the vertical extensions 13 of the hot air chamber, and these oven walls are provided at the upper ends of the chamber extensions with spaced openings 15 for the inlet of the heated air to the interior of the oven. 16 designates damper plates which extend longitudinally through the hot air chamber at the juncture of the vertical portions 13 with the main horizontal portion thereof. These damper plates are pivotally mounted at their lower edges and the pivot rods are extended through the front wall of the furnace so that said damper plates may be engaged at their free edges against the side walls of the oven to close ofi' the main portion of the chamber 10 and prevent the entrance of the heated air upwardly into the extensions 13 of said till too

Between the top horizontal wall of the hot air chamber 10 and the bottom wall of the oven 14 at the rear end of the furnace, a bridge wall 19 is arranged and provided with spaced ports or openings 20. This longitudinally extending space above the hot air chamber constitutes a flue 21 for the products of combustion which pass from the forward end of the firebox around the hot air chamber and contact directly with. the bottom wall of the oven. These products are divided and passed through the openings and upwardly through the vertical fine 22 between the rear wall of the oven and the rear wall of the furnace and then forwardly through the longitudinal flue 23 betweenthe top wall of the oven and t the top wall of the furnace. 24 designates the smoke stack which extends across the front end of the furnace at the top thereof and is in communication with an opening 25- in the furnace wall; Adjacent to this opening, a bridge wall 26 is arranged in the top wall of the furnace andthe oven and is also provided with spaced ports or openings 27 throughwhich the products of combustion finally issue and pass upwardly through thesmoke stack.

From the foregoing description, it will be understood that in the operation of the furnace, thehot air passes from the chamber 10 upwardly into the vertical side portions 13 thereof and through the openings 15 to the interior of the baking oven, thereby quickly heating the oven uniformly throughout its area to a high degree. At the same time, it is to be observed that absolutely no smoke or gas can find its way to the interior of the oven and, by causing the hot air and gas to circulate through fines in immediate contact with the walls of the oven, the proper heating of the oven to the requisite degree is greatly expedited.

It will be understood that the oven may be of any desired capacity and the size of thefurnace correspondingly increased. The fire door is, of course, equipped with the usual draft slide so as to maintain a continuous circulation of the hot air and gases through the several fines to the stack 24. The furnace structure as a Whole is relatively simple and may be erected at comparatively smallcost.

While I have herein shown and described the preferred construction and arrangement of the several parts of the apparatus, it is to be understoodthat the same is susceptible of considerable modification therein and I, therefore, reserve the privilege of adopting Gopiesof this patent may be obtained for to supply atmospheric air to the chamber 10,

whereby the temperature in this chamber may be suitably regulated.

Having thus fully described my invention, what I desire to claim and secure by Letters Patent is 1. In a furnace of the character described, a furnace structure, a fire box the-rein, an oven above the fire box, a hot air chamber disposed between the oven and the fire box and having vertical portions extending upwardly along the side walls of the furnaee and substantially the entire length of the oven and communicating at their upper ends with the interior of the oven, and pivotalh: mounted longitudinally extending damper plates operable to open and close cominunh cation between the body portion of the hot air chamber and the vertical extensions thereof.

2 In a bakers furnace, a furnace strur ture, a longitudinally extending firebox therein, an oven proper above said firebox, a hot air chamber extending across the entire width of the furnace between the firebox and the oven and spaced from the bottom wall of the oven, said hot air chamber havin extensions disposed longitudinally along opposite sides of the firebox and also provided with portions extending vertically in the side walls of the furnace for substantially the entire length of the oven, the side walls of the oven being provided with openings communicating with the latter portions of the hot air chamber, a bridge wall arranged between the rear end of the oven and the top wall of the hot air chamber and having spaced ports therein, the rear wall of the oven being spaced from the rear wall of the furnace to provide a flue and the top wall of the oven being alsospaced from the top wall of the furnace affording a communicating flue for the products of combustion, a smoke stack at the forward end ofthe furnace, and a bridge wall between the furnace wall and the top wall of the oven adjacent said stack and also having spaced portsthrough which the products of combustion issue from the latter flue into the smoke stack.

In testimony whereof I hereunto a llix my signature in the presence of two witnesses.

Witnesses 'lnvmc- B. DoUoLA'ss, Josnrrr W. HnA'roN.

five cents each, by addressing the Commissioner of Patents, Washington, D.IG."" 

